🏷️ Basic Information Identification Make: Yamaha Model: YFM400 Model Variant: YFM400FWA(M) Generation Generation Designation: First Generation Codes Chassis Code: YFM400FWA(M) 👋 Introduction Market Position Vehicle Segment: ATV (All-Terrain Vehicle) Competitive Analysis Key Competitors: Polaris Sportsman, Honda Foreman, Kawasaki Prairie, Suzuki King Quad. Key Features Vehicle Purpose: Designed for utility and recreational trail riding, offering a balance of power and comfort. Manual Benefit: Empowers owners and technicians to perform accurate diagnostics and repairs, ensuring optimal performance and longevity. 📋 Manual Details Coverage Areas Coverage Scope: Complete Official Factory Service / Repair / Full Workshop Page Count Total Pages: 381 Manual Type Manual Category: Service/Repair Manual Language Primary Language: English Format Delivery Format: PDF Download 📖 Manual Coverage Systems Covered Engine System: Comprehensive coverage of engine disassembly, assembly, diagnostics, and tuning. Transmission System: Detailed procedures for the automatic transmission, including fluid checks, adjustments, and overhaul. Chassis And Suspension: Includes front and rear suspension, steering, and frame components. Braking System: Covers hydraulic brake system, including front and rear brake calipers, master cylinder, and bleeding procedures. Electrical System: Extensive coverage of the electrical system, including wiring diagrams, component testing, battery, charging system, ignition, and lighting. Fuel System: Details on fuel tank, fuel pump, carburetor (or EFI system), and fuel lines. Cooling System: Information on radiator, cooling fan, hoses, and thermostat. Exhaust System: Coverage of exhaust pipes, muffler, and heat shields. Body And Trim: Procedures for removing and installing body panels, fenders, and seats. Procedures Included Maintenance Procedures: Routine maintenance tasks such as oil changes, filter replacements, spark plug service, and lubrication. Troubleshooting Guides: Systematic troubleshooting charts for common operational problems and diagnostic procedures. Repair And Rebuild: Step-by-step instructions for component repair and full system rebuilds. Diagnostics: Detailed diagnostic steps for identifying malfunctions using various tools and techniques. Wiring Diagrams: Complete and detailed electrical system wiring diagrams. Torque Specifications: Precise torque values for critical fasteners across all systems. Special Tools: Identification and usage instructions for any specialized tools required for specific repairs. Technical Depth Depth Level: Comprehensive Workshop Manual Diagnostic Capabilities: Advanced diagnostic procedures for in-depth troubleshooting. Rebuild Scope: Full engine and transmission rebuild procedures. 📊 Manual Specifications File Format File Type: PDF Searchability: Keyword Searchable Print Quality Print Capability: Printable Zoom Functionality: Zoom In/Out Supported Binding Type Binding Method: N/A (Digital PDF) Paper Type Paper Quality: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: 4-Stroke, SOHC, Air-Cooled Displacement: 392cc (23.9 cu. in.) Bore X Stroke: 85.0 mm x 70.0 mm (3.35 in. x 2.76 in.) Compression Ratio: 9.2:1 Carburetor: Mikuni BSR33/1, 33 mm Ignition: CDI (Capacitor Discharge Ignition) Performance Estimated Horsepower: Approx. 23 HP @ 6000 RPM Estimated Torque: Approx. 26 lb-ft @ 4500 RPM Fuel System Fuel Type: Unleaded Gasoline Fuel Tank Capacity: 3.2 US gal (12 L) 🔧 Transmission Standard Transmission Type: Automatic (Yamaha Constant Velocity Transmission - Y-CVT) Drive System: Shaft Drive (4x4 models: On-Command 2WD/4WD with Diff Lock) Features Gear Selection: High, Low, Neutral, Reverse Transmission Fluid Type: Yamalube 4 (or equivalent SAE 10W-30 API SG type motor oil) Transmission Fluid Capacity: Approx. 1.7 L (1.8 US qt) 📐 Dimensions Exterior Length: Approx. 76.8 in. (1950 mm) Width: Approx. 43.3 in. (1100 mm) Height: Approx. 45.7 in. (1160 mm) Wheelbase: Approx. 50.0 in. (1270 mm) Ground Clearance: Approx. 6.3 in. (160 mm) Weights Dry Weight: Approx. 538 lbs (244 kg) Wet Weight: Approx. 562 lbs (255 kg) Cargo Front Rack Capacity: Approx. 110 lbs (50 kg) Rear Rack Capacity: Approx. 176 lbs (80 kg) 🛡️ Safety Features Ratings Atv Safety Standards: Compliance with applicable ANSI/SVIA safety standards for ATVs. Active Features Braking Type: Hydraulic Disc Brakes (Front and Rear) Passive Features Lighting: Dual 30W Krypton headlights, 30/30W brake/taillight. Tyre Specifications: Front: AT25x8-12, Rear: AT25x10-12 (Typical) 💡 Technology Features Infotainment Infotainment System: N/A (Basic utility vehicle features). Driver Assistance Assistance Features: On-Command 2WD/4WD system with differential lock for enhanced traction. Connectivity Connectivity Options: N/A (No advanced connectivity features). 🔧 Maintenance Service Intervals Engine Oil Change: Every 3000 km or 6 months, whichever comes first (refer to manual for specific conditions). Air Filter Cleaning: Every 1000 km or 6 months (more frequently in dusty conditions). Spark Plug Check: Every 2000 km or 12 months. Valve Clearance Check: Every 4000 km or 24 months. Fluid Specifications Engine Oil Specification: Yamalube 4 (or equivalent SAE 10W-30 API SG type motor oil) Engine Oil Capacity: Approx. 1.7 L (1.8 US qt) without filter change, 1.9 L (2.0 US qt) with filter change. Coolant Type: Yamaha Coolant (or equivalent ethylene glycol-based antifreeze with distilled water) Known Issues Common Wear Items: Brake pads, wheel bearings, drive belts (in CVT), suspension bushings. Potential Electrical: Wiring harness integrity, stator output (though generally reliable). 📚 Vehicle History Brand Heritage Manufacturer History: Yamaha Motor Company is a Japanese manufacturer of motorcycles, marine products, and other motorized products, known for...